The request
“We've observed issues since enabling the pre-order app. The button sometimes shows both pre-order and notify me, and on some products neither shows. We need your engineers to look.”
An app that wasn't cooperating with the theme.
The approach
We resolved the conflict between the app and the theme's own button logic so each product shows exactly one correct button: add to cart, pre-order, or notify me, depending on inventory and settings.
What we shipped
Button conflict resolved
One correct button per product state
Pre-order app working with the theme
Tested across the catalog